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Biotite from
Bjellåsen 6 (Fisketjønn), Bjellåsen, Froland, Aust-Agder, Norway

Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
References
References:Ihlen P.M., Henderson I., Larsen, R.B., Lynum R. (2001): Potensielle ressurser av kvarts- og feltspatråstoffer på Sørlandet, I: Regional prøvetakning av utvalgte feltspatbrudd i Frolandsområdet. NGU Rapport 2001.044, 46 pp.
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Bjellåsen 6 (Fisketjønn), Bjellåsen, Froland, Aust-Agder, Norway
Nearest other occurrences of Biotite
0.6km (0.4 miles) Bjellåsen, Froland, Aust-Agder, Norway
0.7km (0.4 miles) Rundomsmyråsen, Froland, Aust-Agder, Norway
1.3km (0.8 miles) Northern Lauvrak Feldspar Quarry, Lauvrak, Froland, Aust-Agder, Norway
1.8km (1.1 miles) Kråkevatnet, Hinnebu, Froland, Aust-Agder, Norway
1.8km (1.1 miles) Middle Lauvrak Feldspar quarry, Lauvrak, Froland, Aust-Agder, Norway
2.1km (1.3 miles) Sauetjennheia (Sauetjernheia), Birkenes, Aust-Agder, Norway
2.1km (1.3 miles) Blengsvatn, Froland, Aust-Agder, Norway
2.9km (1.8 miles) Lauvrak, Froland, Aust-Agder, Norway
3.1km (1.9 miles) Hellheia 2 (Hellheia; nordre), Hellheia, Froland, Aust-Agder, Norway
3.8km (2.4 miles) Rambeisåsen 04 Feldspar Quarry (Søndre Rambergåsen), Rambeisåsen, Froland, Aust-Agder, Norway
 
Mineral and/or Locality  
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